Ballpoint pen



FIG. 1 is a top view of a ballpoint pen of the present invention;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a partial front view of the lower portion of the ballpoint penshown without the upper part because it is enlarged for clarity.

The broken line in FIG. 7 is included to show the broken away edge ofthe partial figure that forms no part of the claimed design.

The ornamental design for a ballpoint pen, as shown and described.